class Video:
    def __init__(self, vid: int, maintype: str, tag: list):
        self.vid = vid
        self.maintype = maintype
        self.tag = tag


class User:
    def __init__(self, uid: int, firstexp: list):
        self.uid = uid
        self.videomarked = firstexp  # 第一次实验中用户的推送列表(vid list)


